![]() ![]()
A True RMS DMM reads the heating effect of the non-sinusoidal voltage applied to the motor, while the motor controller's output voltage reading only displays the RMS value of the fundamental component (typically from 30 Hz to 60 Hz). On the flip side, a regular True RMS multimeter can't reliably read the output side of a pulse width modulated (PWM) motor drive, because the ASD applies pulse width modulated nonsinusoidal voltage to the motor terminals. A significant unbalance may lead to erratic drive operation and should be corrected when discovered. The input voltage readings should be within 1% of one another when measured from phase to phase with no load. Drive measurementsĪny good quality True RMS multimeter can verify proper input power to an ASD. Now, technicians won't have to guess whether the drive is operating correctly and delivering the correct voltage, current, or frequency for a given control setting. Incorporates a selectable low pass filter* that allows for accurate drive output measurements that agree with the motor drive controller display indicator. But until now, there hasn't been a digital multimeter on the market able to accurately measure ASDs. This is especially true when taking voltage, frequency, and current measurements on the output side of the motor drive. Likewise, choosing the right test tools for troubleshooting the drive, the motor, and the connections are of utmost importance. Nobody takes inaccurate measurements on purpose, but it's easy to do, especially when working in a high-energy, noisy environment like an ASD. As you go, take care to take accurate measurements. A lot of time and money can be wasted replacing perfectly good parts when the problem is simply a loose connection. The most efficient troubleshooting procedure begins at the motor and then works systematically back to the electrical source, looking for the most obvious problems first. The trick is tracking it down quickly and keeping downtime to a minimum. Technicians use many different methods to troubleshoot an electrical circuit, and a good troubleshooter will always find the problem - eventually. Users can rely on this True RMS digital multimeter for accurate, True RMS readings through years of reliable service.Īlkaline approximately 200 hours typical, without backlightĬlick here for complete specifications on the Fluke 175 And Display Hold and Auto Hold will help you capture significant events.Īll inputs are protected to IEN61010-1 CAT IV 600 V/CAT III 1000 V. You can find problems fast with all the basic troubleshooting measurements such as frequency, capacitance, resistance, continuity, and diode. FLUKE MULTIMETERS PROFESSIONALAllows closed-case calibration through front panelĭelivers the baseline general purpose features required by professional technicians around the world.Safety rated CAT III 1000 V, CAT IV 600 V. FLUKE MULTIMETERS MANUAL
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |